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Date: Thu, 29 May 2014 09:01:52 +0100
From: Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH RESEND] ARM: kdump: 2nd kernel should use strict
 pfn_valid in SPARSEMEM platform
Message-ID: <20140529080151.GB29812@arm.com>
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To: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Wang Nan <wangnan0@huawei.com>, Russell King <linux@arm.linux.org.uk>, Catalin Marinas <Catalin.Marinas@arm.com>, "kexec@lists.infradead.org" <kexec@lists.infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, Geng Hui <hui.geng@huawei.com>, Simon Horman <horms@verge.net.au>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>

On Thu, May 29, 2014 at 05:54:02AM +0100, AKASHI Takahiro wrote:
> Catalin, Will
> 
> Can we assume that HAVE_ARCH_PFN_VALID is alway yes on arm64?
> Looking at arm64/Kconfig,
> config ARCH_HAS_HOLES_MEMORYMODEL
> 	def_bool y if SPARSEMEM
> ...
> config HAVE_ARCH_PFN_VALID
> 	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
> 
> is this intentional?

Looks like an artifact of the way we constructed those option, so yes, we
could just make that a def_bool y if you like.

Will

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